回复：印度同事出的题，瓦爷用了5妙钟，都来试试。

来源: wu2ming2 于 2010-04-21 12:33:04 [] [旧帖] [给我悄悄话] 阅读数 : (126 bytes)

This should not be a tricky question. "+" should be replaced with an unknown operation (?) to make it a valid math exercise.

请您先登陆，再发跟帖！